from django import template

register = template.Library()

@register.filter
def initials(user):
    """Return initials from user first + last name."""
    if not user.first_name and not user.last_name:
        return "U"
    first = user.first_name[0] if user.first_name else ""
    last = user.last_name[0] if user.last_name else ""
    return (first + last).upper()